| 1 |
<?php |
| 2 |
|
| 3 |
$page_optimize_types = array( |
| 4 |
'css' => 'text/css', |
| 5 |
'js' => 'application/javascript' |
| 6 |
); |
| 7 |
|
| 8 |
function page_optimize_service_request() { |
| 9 |
$use_cache = defined( 'PAGE_OPTIMIZE_CACHE_DIR' ) && ! empty( PAGE_OPTIMIZE_CACHE_DIR ); |
| 10 |
if ( $use_cache && ! is_dir( PAGE_OPTIMIZE_CACHE_DIR ) && ! mkdir( PAGE_OPTIMIZE_CACHE_DIR, 0775, true ) ) { |
| 11 |
$use_cache = false; |
| 12 |
error_log( sprintf( |
| 13 |
/* translators: a filesystem path to a directory */ |
| 14 |
__( "Disabling page-optimize cache. Unable to create cache directory '%s'.", page_optimize_get_text_domain() ), |
| 15 |
PAGE_OPTIMIZE_CACHE_DIR |
| 16 |
) ); |
| 17 |
} |
| 18 |
if ( $use_cache && ( ! is_dir( PAGE_OPTIMIZE_CACHE_DIR ) || ! is_writable( PAGE_OPTIMIZE_CACHE_DIR ) || ! is_executable( PAGE_OPTIMIZE_CACHE_DIR ) ) ) { |
| 19 |
$use_cache = false; |
| 20 |
error_log( sprintf( |
| 21 |
/* translators: a filesystem path to a directory */ |
| 22 |
__( "Disabling page-optimize cache. Unable to write to cache directory '%s'.", page_optimize_get_text_domain() ), |
| 23 |
PAGE_OPTIMIZE_CACHE_DIR |
| 24 |
) ); |
| 25 |
} |
| 26 |
|
| 27 |
if ( $use_cache ) { |
| 28 |
$request_uri_hash = md5( $_SERVER['REQUEST_URI'] ); |
| 29 |
$cache_file = PAGE_OPTIMIZE_CACHE_DIR . "/page-optimize-cache-$request_uri_hash"; |
| 30 |
$cache_file_meta = PAGE_OPTIMIZE_CACHE_DIR . "/page-optimize-cache-meta-$request_uri_hash"; |
| 31 |
|
| 32 |
if ( file_exists( $cache_file ) ) { |
| 33 |
if ( isset( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) { |
| 34 |
if ( strtotime( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) < filemtime( $cache_file ) ) { |
| 35 |
header( 'HTTP/1.1 304 Not Modified' ); |
| 36 |
exit; |
| 37 |
} |
| 38 |
} |
| 39 |
|
| 40 |
if ( file_exists( $cache_file_meta ) ) { |
| 41 |
$meta = json_decode( file_get_contents( $cache_file_meta ) ); |
| 42 |
if ( null !== $meta && isset( $meta->headers ) ) { |
| 43 |
foreach ( $meta->headers as $header ) { |
| 44 |
header( $header ); |
| 45 |
} |
| 46 |
} |
| 47 |
} |
| 48 |
|
| 49 |
$etag = '"' . md5( file_get_contents( $cache_file ) ) . '"'; |
| 50 |
|
| 51 |
header( 'X-Page-Optimize: cached' ); |
| 52 |
header( 'Cache-Control: max-age=' . 31536000 ); |
| 53 |
header( 'ETag: ' . $etag ); |
| 54 |
|
| 55 |
echo file_get_contents( $cache_file ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- We need to trust this unfortunately. |
| 56 |
die(); |
| 57 |
} |
| 58 |
} |
| 59 |
|
| 60 |
$output = page_optimize_build_output(); |
| 61 |
$content = $output['content']; |
| 62 |
$headers = $output['headers']; |
| 63 |
|
| 64 |
foreach( $headers as $header ) { |
| 65 |
header( $header ); |
| 66 |
} |
| 67 |
header( 'X-Page-Optimize: uncached' ); |
| 68 |
header( 'Cache-Control: max-age=' . 31536000 ); |
| 69 |
header( 'ETag: "' . md5( $content ) . '"' ); |
| 70 |
|
| 71 |
echo $content; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- We need to trust this unfortunately. |
| 72 |
|
| 73 |
if ( $use_cache ) { |
| 74 |
file_put_contents( $cache_file, $content ); |
| 75 |
file_put_contents( $cache_file_meta, json_encode( array( 'headers' => $headers ) ) ); |
| 76 |
} |
| 77 |
|
| 78 |
die(); |
| 79 |
} |
| 80 |
|
| 81 |
function page_optimize_build_output() { |
| 82 |
global $page_optimize_types; |
| 83 |
|
| 84 |
require_once __DIR__ . '/cssmin/cssmin.php'; |
| 85 |
|
| 86 |
/* Config */ |
| 87 |
$concat_max_files = 300; |
| 88 |
$concat_unique = true; |
| 89 |
|
| 90 |
/* Main() */ |
| 91 |
if ( ! in_array( $_SERVER['REQUEST_METHOD'], array( 'GET', 'HEAD' ) ) ) { |
| 92 |
page_optimize_status_exit( 400 ); |
| 93 |
} |
| 94 |
|
| 95 |
// /_static/??/foo/bar.css,/foo1/bar/baz.css?m=293847g |
| 96 |
// or |
| 97 |
// /_static/??-eJzTT8vP109KLNJLLi7W0QdyDEE8IK4CiVjn2hpZGluYmKcDABRMDPM= |
| 98 |
$args = parse_url( $_SERVER['REQUEST_URI'], PHP_URL_QUERY ); |
| 99 |
if ( ! $args || false === strpos( $args, '?' ) ) { |
| 100 |
page_optimize_status_exit( 400 ); |
| 101 |
} |
| 102 |
|
| 103 |
$args = substr( $args, strpos( $args, '?' ) + 1 ); |
| 104 |
|
| 105 |
// /foo/bar.css,/foo1/bar/baz.css?m=293847g |
| 106 |
// or |
| 107 |
// -eJzTT8vP109KLNJLLi7W0QdyDEE8IK4CiVjn2hpZGluYmKcDABRMDPM= |
| 108 |
if ( '-' == $args[0] ) { |
| 109 |
$args = @gzuncompress( base64_decode( substr( $args, 1 ) ) ); |
| 110 |
|
| 111 |
// Invalid data, abort! |
| 112 |
if ( false === $args ) { |
| 113 |
page_optimize_status_exit( 400 ); |
| 114 |
} |
| 115 |
} |
| 116 |
|
| 117 |
// /foo/bar.css,/foo1/bar/baz.css?m=293847g |
| 118 |
$version_string_pos = strpos( $args, '?' ); |
| 119 |
if ( false !== $version_string_pos ) { |
| 120 |
$args = substr( $args, 0, $version_string_pos ); |
| 121 |
} |
| 122 |
|
| 123 |
// /foo/bar.css,/foo1/bar/baz.css |
| 124 |
$args = explode( ',', $args ); |
| 125 |
if ( ! $args ) { |
| 126 |
page_optimize_status_exit( 400 ); |
| 127 |
} |
| 128 |
|
| 129 |
// array( '/foo/bar.css', '/foo1/bar/baz.css' ) |
| 130 |
if ( 0 == count( $args ) || count( $args ) > $concat_max_files ) { |
| 131 |
page_optimize_status_exit( 400 ); |
| 132 |
} |
| 133 |
|
| 134 |
// If we're in a subdirectory context, use that as the root. |
| 135 |
// We can't assume that the root serves the same content as the subdir. |
| 136 |
$subdir_path_prefix = ''; |
| 137 |
$request_path = parse_url( $_SERVER['REQUEST_URI'], PHP_URL_PATH ); |
| 138 |
$_static_index = strpos( $request_path, '/_static/' ); |
| 139 |
if ( $_static_index > 0 ) { |
| 140 |
$subdir_path_prefix = substr( $request_path, 0, $_static_index ); |
| 141 |
} |
| 142 |
unset( $request_path, $_static_index ); |
| 143 |
|
| 144 |
$last_modified = 0; |
| 145 |
$pre_output = ''; |
| 146 |
$output = ''; |
| 147 |
|
| 148 |
$should_minify_css = defined( 'PAGE_OPTIMIZE_CSS_MINIFY' ) && ! empty( PAGE_OPTIMIZE_CSS_MINIFY ); |
| 149 |
|
| 150 |
if ( $should_minify_css ) { |
| 151 |
$css_minify = new tubalmartin\CssMin\Minifier; |
| 152 |
} |
| 153 |
|
| 154 |
foreach ( $args as $uri ) { |
| 155 |
$fullpath = page_optimize_get_path( $uri ); |
| 156 |
|
| 157 |
if ( ! file_exists( $fullpath ) ) { |
| 158 |
page_optimize_status_exit( 404 ); |
| 159 |
} |
| 160 |
|
| 161 |
$mime_type = page_optimize_get_mime_type( $fullpath ); |
| 162 |
if ( ! in_array( $mime_type, $page_optimize_types ) ) { |
| 163 |
page_optimize_status_exit( 400 ); |
| 164 |
} |
| 165 |
|
| 166 |
if ( $concat_unique ) { |
| 167 |
if ( ! isset( $last_mime_type ) ) { |
| 168 |
$last_mime_type = $mime_type; |
| 169 |
} |
| 170 |
|
| 171 |
if ( $last_mime_type != $mime_type ) { |
| 172 |
page_optimize_status_exit( 400 ); |
| 173 |
} |
| 174 |
} |
| 175 |
|
| 176 |
$stat = stat( $fullpath ); |
| 177 |
if ( false === $stat ) { |
| 178 |
page_optimize_status_exit( 500 ); |
| 179 |
} |
| 180 |
|
| 181 |
if ( $stat['mtime'] > $last_modified ) { |
| 182 |
$last_modified = $stat['mtime']; |
| 183 |
} |
| 184 |
|
| 185 |
$buf = file_get_contents( $fullpath ); |
| 186 |
if ( false === $buf ) { |
| 187 |
page_optimize_status_exit( 500 ); |
| 188 |
} |
| 189 |
|
| 190 |
if ( 'text/css' == $mime_type ) { |
| 191 |
$dirpath = '/' . ltrim( $subdir_path_prefix . dirname( $uri ), '/' ); |
| 192 |
|
| 193 |
// url(relative/path/to/file) -> url(/absolute/and/not/relative/path/to/file) |
| 194 |
$buf = page_optimize_relative_path_replace( $buf, $dirpath ); |
| 195 |
|
| 196 |
// AlphaImageLoader(...src='relative/path/to/file'...) -> AlphaImageLoader(...src='/absolute/path/to/file'...) |
| 197 |
$buf = preg_replace( |
| 198 |
'/(Microsoft.AlphaImageLoader\s*\([^\)]*src=(?:\'|")?)([^\/\'"\s\)](?:(?<!http:|https:).)*)\)/isU', |
| 199 |
'$1' . ( $dirpath == '/' ? '/' : $dirpath . '/' ) . '$2)', |
| 200 |
$buf |
| 201 |
); |
| 202 |
|
| 203 |
// The @charset rules must be on top of the output |
| 204 |
if ( 0 === stripos( $buf, '@charset' ) ) { |
| 205 |
$buf = preg_replace_callback( |
| 206 |
'/(?P<charset_rule>@charset\s+[\'"][^\'"]+[\'"];)/i', |
| 207 |
function ( $match ) use ( &$pre_output ) { |
| 208 |
|
| 209 |
if ( 0 === stripos( (string) $pre_output, '@charset' ) ) { |
| 210 |
return ''; |
| 211 |
} |
| 212 |
|
| 213 |
$pre_output = $match[0] . "\n" . $pre_output; |
| 214 |
return ''; |
| 215 |
}, |
| 216 |
$buf |
| 217 |
); |
| 218 |
} |
| 219 |
|
| 220 |
// Move the @import rules on top of the concatenated output. |
| 221 |
// Only @charset rule are allowed before them. |
| 222 |
if ( false !== stripos( $buf, '@import' ) ) { |
| 223 |
// Regex-based hoisting breaks on URLs containing semicolons (like Google Fonts) |
| 224 |
$buf = page_optimize_hoist_css_import_rules( $buf, $dirpath, $pre_output ); |
| 225 |
} |
| 226 |
|
| 227 |
if ( $should_minify_css ) { |
| 228 |
$buf = $css_minify->run( $buf ); |
| 229 |
} |
| 230 |
} |
| 231 |
|
| 232 |
if ( $page_optimize_types['js'] === $mime_type ) { |
| 233 |
$output .= "$buf;\n"; |
| 234 |
} else { |
| 235 |
$output .= "$buf"; |
| 236 |
} |
| 237 |
} |
| 238 |
|
| 239 |
$headers = array( |
| 240 |
'Last-Modified: ' . gmdate( 'D, d M Y H:i:s', $last_modified ) . ' GMT', |
| 241 |
'Content-Length: ' . ( strlen( $pre_output ) + strlen( $output ) ), |
| 242 |
"Content-Type: $mime_type", |
| 243 |
); |
| 244 |
|
| 245 |
return array( |
| 246 |
'headers' => $headers, |
| 247 |
'content' => $pre_output . $output, |
| 248 |
); |
| 249 |
} |
| 250 |
|
| 251 |
function page_optimize_status_exit( $status ) { |
| 252 |
http_response_code( $status ); |
| 253 |
exit; |
| 254 |
} |
| 255 |
|
| 256 |
function page_optimize_get_mime_type( $file ) { |
| 257 |
global $page_optimize_types; |
| 258 |
|
| 259 |
$lastdot_pos = strrpos( $file, '.' ); |
| 260 |
if ( false === $lastdot_pos ) { |
| 261 |
return false; |
| 262 |
} |
| 263 |
|
| 264 |
$ext = substr( $file, $lastdot_pos + 1 ); |
| 265 |
|
| 266 |
return isset( $page_optimize_types[ $ext ] ) ? $page_optimize_types[ $ext ] : false; |
| 267 |
} |
| 268 |
|
| 269 |
function page_optimize_relative_path_replace( $buf, $dirpath ) { |
| 270 |
// url(relative/path/to/file) -> url(/absolute/and/not/relative/path/to/file) |
| 271 |
$buf = preg_replace( |
| 272 |
'/(:?\s*url\s*\()\s*(?:\'|")?\s*([^\/\'"\s\)](?:(?<!data:|http:|https:|[\(\'"]#|%23).)*)[\'"\s]*\)/isU', |
| 273 |
'$1' . ( $dirpath == '/' ? '/' : $dirpath . '/' ) . '$2)', |
| 274 |
$buf |
| 275 |
); |
| 276 |
|
| 277 |
return $buf; |
| 278 |
} |
| 279 |
|
| 280 |
/** |
| 281 |
* Hoist CSS @import rules from a stylesheet body. |
| 282 |
* |
| 283 |
* @param string $buf Stylesheet contents. |
| 284 |
* @param string $dirpath Directory path used for resolving relative imports. |
| 285 |
* @param string $pre_output Buffer for hoisted rules. |
| 286 |
* |
| 287 |
* @return string Stylesheet body without hoisted @import rules. |
| 288 |
*/ |
| 289 |
function page_optimize_hoist_css_import_rules( $buf, $dirpath, &$pre_output ) { |
| 290 |
$offset = 0; |
| 291 |
$new_buf = ''; |
| 292 |
$new_pre_output = ''; |
| 293 |
|
| 294 |
while ( true ) { |
| 295 |
$import_pos = page_optimize_css_find_next_import_position( $buf, $offset ); |
| 296 |
if ( false === $import_pos ) { |
| 297 |
break; |
| 298 |
} |
| 299 |
|
| 300 |
$rule_end_pos = page_optimize_css_find_import_rule_end( $buf, $import_pos ); |
| 301 |
if ( false === $rule_end_pos ) { |
| 302 |
// Parsing failed; keep original buffer unchanged. |
| 303 |
return $buf; |
| 304 |
} |
| 305 |
|
| 306 |
$new_buf .= substr( $buf, $offset, $import_pos - $offset ); |
| 307 |
$rule = substr( $buf, $import_pos, $rule_end_pos - $import_pos + 1 ); |
| 308 |
|
| 309 |
$new_pre_output .= page_optimize_css_rewrite_import_rule_path( $rule, $dirpath ) . "\n"; |
| 310 |
$offset = $rule_end_pos + 1; |
| 311 |
} |
| 312 |
|
| 313 |
$new_buf .= substr( $buf, $offset ); |
| 314 |
$pre_output .= $new_pre_output; |
| 315 |
|
| 316 |
return $new_buf; |
| 317 |
} |
| 318 |
|
| 319 |
/** |
| 320 |
* Find the next @import position outside quoted strings and block comments. |
| 321 |
* |
| 322 |
* @param string $css Source CSS. |
| 323 |
* @param int $offset Search offset. |
| 324 |
* |
| 325 |
* @return int|false |
| 326 |
*/ |
| 327 |
function page_optimize_css_find_next_import_position( $css, $offset = 0 ) { |
| 328 |
$length = strlen( $css ); |
| 329 |
$quote = ''; |
| 330 |
$brace_depth = 0; |
| 331 |
|
| 332 |
for ( $i = $offset; $i < $length; $i++ ) { |
| 333 |
$char = $css[ $i ]; |
| 334 |
|
| 335 |
if ( '' !== $quote ) { |
| 336 |
if ( '\\' === $char && $i + 1 < $length ) { |
| 337 |
$i++; |
| 338 |
continue; |
| 339 |
} |
| 340 |
|
| 341 |
if ( $quote === $char ) { |
| 342 |
$quote = ''; |
| 343 |
} |
| 344 |
|
| 345 |
continue; |
| 346 |
} |
| 347 |
|
| 348 |
if ( '/' === $char && $i + 1 < $length && '*' === $css[ $i + 1 ] ) { |
| 349 |
$comment_end = strpos( $css, '*/', $i + 2 ); |
| 350 |
if ( false === $comment_end ) { |
| 351 |
return false; |
| 352 |
} |
| 353 |
|
| 354 |
$i = $comment_end + 1; |
| 355 |
continue; |
| 356 |
} |
| 357 |
|
| 358 |
if ( '\'' === $char || '"' === $char ) { |
| 359 |
$quote = $char; |
| 360 |
continue; |
| 361 |
} |
| 362 |
|
| 363 |
if ( '{' === $char ) { |
| 364 |
$brace_depth++; |
| 365 |
continue; |
| 366 |
} |
| 367 |
|
| 368 |
if ( '}' === $char ) { |
| 369 |
if ( $brace_depth > 0 ) { |
| 370 |
$brace_depth--; |
| 371 |
} |
| 372 |
continue; |
| 373 |
} |
| 374 |
|
| 375 |
if ( $brace_depth > 0 ) { |
| 376 |
continue; |
| 377 |
} |
| 378 |
|
| 379 |
if ( '@' !== $char ) { |
| 380 |
continue; |
| 381 |
} |
| 382 |
|
| 383 |
if ( 0 !== strncasecmp( substr( $css, $i, 7 ), '@import', 7 ) ) { |
| 384 |
continue; |
| 385 |
} |
| 386 |
|
| 387 |
$next_char_pos = $i + 7; |
| 388 |
if ( $next_char_pos < $length && page_optimize_css_is_identifier_char( $css[ $next_char_pos ] ) ) { |
| 389 |
continue; |
| 390 |
} |
| 391 |
|
| 392 |
if ( ! page_optimize_css_is_valid_import_next_char( $css, $next_char_pos, $length ) ) { |
| 393 |
continue; |
| 394 |
} |
| 395 |
|
| 396 |
return $i; |
| 397 |
} |
| 398 |
|
| 399 |
return false; |
| 400 |
} |
| 401 |
|
| 402 |
/** |
| 403 |
* Find the semicolon that terminates an @import rule. |
| 404 |
* |
| 405 |
* @param string $css CSS source. |
| 406 |
* @param int $import_pos Position of the @import token. |
| 407 |
* |
| 408 |
* @return int|false |
| 409 |
*/ |
| 410 |
function page_optimize_css_find_import_rule_end( $css, $import_pos ) { |
| 411 |
$length = strlen( $css ); |
| 412 |
$quote = ''; |
| 413 |
$paren_depth = 0; |
| 414 |
|
| 415 |
for ( $i = $import_pos; $i < $length; $i++ ) { |
| 416 |
$char = $css[ $i ]; |
| 417 |
|
| 418 |
if ( '' !== $quote ) { |
| 419 |
if ( '\\' === $char && $i + 1 < $length ) { |
| 420 |
$i++; |
| 421 |
continue; |
| 422 |
} |
| 423 |
|
| 424 |
if ( $quote === $char ) { |
| 425 |
$quote = ''; |
| 426 |
} |
| 427 |
|
| 428 |
continue; |
| 429 |
} |
| 430 |
|
| 431 |
if ( '/' === $char && $i + 1 < $length && '*' === $css[ $i + 1 ] ) { |
| 432 |
$comment_end = strpos( $css, '*/', $i + 2 ); |
| 433 |
if ( false === $comment_end ) { |
| 434 |
return false; |
| 435 |
} |
| 436 |
|
| 437 |
$i = $comment_end + 1; |
| 438 |
continue; |
| 439 |
} |
| 440 |
|
| 441 |
if ( '\'' === $char || '"' === $char ) { |
| 442 |
$quote = $char; |
| 443 |
continue; |
| 444 |
} |
| 445 |
|
| 446 |
if ( '(' === $char ) { |
| 447 |
$paren_depth++; |
| 448 |
continue; |
| 449 |
} |
| 450 |
|
| 451 |
if ( ')' === $char ) { |
| 452 |
if ( $paren_depth > 0 ) { |
| 453 |
$paren_depth--; |
| 454 |
} |
| 455 |
continue; |
| 456 |
} |
| 457 |
|
| 458 |
if ( ';' === $char && 0 === $paren_depth ) { |
| 459 |
return $i; |
| 460 |
} |
| 461 |
|
| 462 |
if ( '{' === $char && 0 === $paren_depth ) { |
| 463 |
return false; |
| 464 |
} |
| 465 |
} |
| 466 |
|
| 467 |
return false; |
| 468 |
} |
| 469 |
|
| 470 |
/** |
| 471 |
* Rewrite relative @import paths using the current file directory. |
| 472 |
* |
| 473 |
* @param string $rule Complete @import rule including terminating semicolon. |
| 474 |
* @param string $dirpath Directory path used for resolving relative imports. |
| 475 |
* |
| 476 |
* @return string |
| 477 |
*/ |
| 478 |
function page_optimize_css_rewrite_import_rule_path( $rule, $dirpath ) { |
| 479 |
$length = strlen( $rule ); |
| 480 |
$import_pos = stripos( $rule, '@import' ); |
| 481 |
if ( false === $import_pos ) { |
| 482 |
return $rule; |
| 483 |
} |
| 484 |
|
| 485 |
$cursor = $import_pos + 7; // strlen('@import'). |
| 486 |
$cursor = page_optimize_css_skip_whitespace_and_comments( $rule, $cursor, $length ); |
| 487 |
if ( false === $cursor ) { |
| 488 |
return $rule; |
| 489 |
} |
| 490 |
|
| 491 |
if ( $cursor >= $length ) { |
| 492 |
return $rule; |
| 493 |
} |
| 494 |
|
| 495 |
$path_pos = null; |
| 496 |
$path_len = null; |
| 497 |
|
| 498 |
// Parse either @import "..." or @import url(...) |
| 499 |
if ( '\'' === $rule[ $cursor ] || '"' === $rule[ $cursor ] ) { |
| 500 |
$quote = $rule[ $cursor ]; |
| 501 |
$path_pos = $cursor + 1; |
| 502 |
$cursor++; |
| 503 |
|
| 504 |
while ( $cursor < $length ) { |
| 505 |
if ( '\\' === $rule[ $cursor ] && $cursor + 1 < $length ) { |
| 506 |
$cursor += 2; |
| 507 |
continue; |
| 508 |
} |
| 509 |
|
| 510 |
if ( $quote === $rule[ $cursor ] ) { |
| 511 |
$path_len = $cursor - $path_pos; |
| 512 |
break; |
| 513 |
} |
| 514 |
|
| 515 |
$cursor++; |
| 516 |
} |
| 517 |
} elseif ( 0 === strncasecmp( substr( $rule, $cursor, 3 ), 'url', 3 ) ) { |
| 518 |
$cursor += 3; |
| 519 |
|
| 520 |
$cursor = page_optimize_css_skip_whitespace_and_comments( $rule, $cursor, $length ); |
| 521 |
if ( false === $cursor ) { |
| 522 |
return $rule; |
| 523 |
} |
| 524 |
|
| 525 |
if ( $cursor >= $length || '(' !== $rule[ $cursor ] ) { |
| 526 |
return $rule; |
| 527 |
} |
| 528 |
|
| 529 |
$cursor++; |
| 530 |
$cursor = page_optimize_css_skip_whitespace_and_comments( $rule, $cursor, $length ); |
| 531 |
if ( false === $cursor ) { |
| 532 |
return $rule; |
| 533 |
} |
| 534 |
|
| 535 |
if ( $cursor >= $length ) { |
| 536 |
return $rule; |
| 537 |
} |
| 538 |
|
| 539 |
if ( '\'' === $rule[ $cursor ] || '"' === $rule[ $cursor ] ) { |
| 540 |
$quote = $rule[ $cursor ]; |
| 541 |
$path_pos = $cursor + 1; |
| 542 |
$cursor++; |
| 543 |
|
| 544 |
while ( $cursor < $length ) { |
| 545 |
if ( '\\' === $rule[ $cursor ] && $cursor + 1 < $length ) { |
| 546 |
$cursor += 2; |
| 547 |
continue; |
| 548 |
} |
| 549 |
|
| 550 |
if ( $quote === $rule[ $cursor ] ) { |
| 551 |
$path_len = $cursor - $path_pos; |
| 552 |
$cursor++; |
| 553 |
break; |
| 554 |
} |
| 555 |
|
| 556 |
$cursor++; |
| 557 |
} |
| 558 |
|
| 559 |
if ( null === $path_len ) { |
| 560 |
return $rule; |
| 561 |
} |
| 562 |
|
| 563 |
$cursor = page_optimize_css_skip_whitespace_and_comments( $rule, $cursor, $length ); |
| 564 |
if ( false === $cursor ) { |
| 565 |
return $rule; |
| 566 |
} |
| 567 |
|
| 568 |
if ( $cursor >= $length || ')' !== $rule[ $cursor ] ) { |
| 569 |
return $rule; |
| 570 |
} |
| 571 |
} else { |
| 572 |
$path_pos = $cursor; |
| 573 |
while ( $cursor < $length && ')' !== $rule[ $cursor ] ) { |
| 574 |
$cursor++; |
| 575 |
} |
| 576 |
|
| 577 |
if ( $cursor >= $length ) { |
| 578 |
return $rule; |
| 579 |
} |
| 580 |
|
| 581 |
$path_end = $cursor; |
| 582 |
while ( $path_end > $path_pos && ctype_space( $rule[ $path_end - 1 ] ) ) { |
| 583 |
$path_end--; |
| 584 |
} |
| 585 |
|
| 586 |
$path_len = $path_end - $path_pos; |
| 587 |
} |
| 588 |
} |
| 589 |
|
| 590 |
if ( null === $path_pos || null === $path_len || $path_len <= 0 ) { |
| 591 |
return $rule; |
| 592 |
} |
| 593 |
|
| 594 |
$path = substr( $rule, $path_pos, $path_len ); |
| 595 |
if ( '' === $path || page_optimize_css_import_path_is_absolute( $path ) ) { |
| 596 |
return $rule; |
| 597 |
} |
| 598 |
|
| 599 |
$new_path = ( '/' === $dirpath ? '/' : $dirpath . '/' ) . $path; |
| 600 |
|
| 601 |
return substr( $rule, 0, $path_pos ) . $new_path . substr( $rule, $path_pos + $path_len ); |
| 602 |
} |
| 603 |
|
| 604 |
/** |
| 605 |
* Determine whether the given @import path is absolute. |
| 606 |
* |
| 607 |
* @param string $path Import path. |
| 608 |
* |
| 609 |
* @return bool |
| 610 |
*/ |
| 611 |
function page_optimize_css_import_path_is_absolute( $path ) { |
| 612 |
if ( '' === $path ) { |
| 613 |
return true; |
| 614 |
} |
| 615 |
|
| 616 |
if ( '/' === $path[0] ) { |
| 617 |
return true; |
| 618 |
} |
| 619 |
|
| 620 |
return 1 === preg_match( '#^[a-z][a-z0-9+.-]*:#i', $path ); |
| 621 |
} |
| 622 |
|
| 623 |
/** |
| 624 |
* Determine whether a character can appear in a CSS identifier. |
| 625 |
* |
| 626 |
* @param string $char Single character. |
| 627 |
* |
| 628 |
* @return bool |
| 629 |
*/ |
| 630 |
function page_optimize_css_is_identifier_char( $char ) { |
| 631 |
return ctype_alnum( $char ) || '_' === $char || '-' === $char; |
| 632 |
} |
| 633 |
|
| 634 |
/** |
| 635 |
* Determine whether the next token after "@import" can start a valid rule. |
| 636 |
* |
| 637 |
* @param string $css Source CSS. |
| 638 |
* @param int $next_char_pos Position immediately after "@import". |
| 639 |
* @param int $length CSS length. |
| 640 |
* |
| 641 |
* @return bool |
| 642 |
*/ |
| 643 |
function page_optimize_css_is_valid_import_next_char( $css, $next_char_pos, $length ) { |
| 644 |
if ( $next_char_pos >= $length ) { |
| 645 |
return false; |
| 646 |
} |
| 647 |
|
| 648 |
$next_char = $css[ $next_char_pos ]; |
| 649 |
if ( ctype_space( $next_char ) || '\'' === $next_char || '"' === $next_char ) { |
| 650 |
return true; |
| 651 |
} |
| 652 |
|
| 653 |
return '/' === $next_char && $next_char_pos + 1 < $length && '*' === $css[ $next_char_pos + 1 ]; |
| 654 |
} |
| 655 |
|
| 656 |
/** |
| 657 |
* Skip CSS whitespace and block comments. |
| 658 |
* |
| 659 |
* @param string $css CSS source. |
| 660 |
* @param int $cursor Start offset. |
| 661 |
* @param int $length CSS length. |
| 662 |
* |
| 663 |
* @return int|false Next offset or false on malformed comment. |
| 664 |
*/ |
| 665 |
function page_optimize_css_skip_whitespace_and_comments( $css, $cursor, $length ) { |
| 666 |
while ( $cursor < $length ) { |
| 667 |
$char = $css[ $cursor ]; |
| 668 |
|
| 669 |
if ( ctype_space( $char ) ) { |
| 670 |
$cursor++; |
| 671 |
continue; |
| 672 |
} |
| 673 |
|
| 674 |
if ( '/' === $char && $cursor + 1 < $length && '*' === $css[ $cursor + 1 ] ) { |
| 675 |
$comment_end = strpos( $css, '*/', $cursor + 2 ); |
| 676 |
if ( false === $comment_end ) { |
| 677 |
return false; |
| 678 |
} |
| 679 |
|
| 680 |
$cursor = $comment_end + 2; |
| 681 |
continue; |
| 682 |
} |
| 683 |
|
| 684 |
break; |
| 685 |
} |
| 686 |
|
| 687 |
return $cursor; |
| 688 |
} |
| 689 |
|
| 690 |
function page_optimize_get_path( $uri ) { |
| 691 |
static $dependency_path_mapping; |
| 692 |
|
| 693 |
if ( ! strlen( $uri ) ) { |
| 694 |
page_optimize_status_exit( 400 ); |
| 695 |
} |
| 696 |
|
| 697 |
if ( false !== strpos( $uri, '..' ) || false !== strpos( $uri, "\0" ) ) { |
| 698 |
page_optimize_status_exit( 400 ); |
| 699 |
} |
| 700 |
|
| 701 |
if ( defined( 'PAGE_OPTIMIZE_CONCAT_BASE_DIR' ) ) { |
| 702 |
$path = realpath( PAGE_OPTIMIZE_CONCAT_BASE_DIR . "/$uri" ); |
| 703 |
|
| 704 |
if ( false === $path ) { |
| 705 |
$path = realpath( PAGE_OPTIMIZE_ABSPATH . "/$uri" ); |
| 706 |
} |
| 707 |
} else { |
| 708 |
if ( empty( $dependency_path_mapping ) ) { |
| 709 |
require_once __DIR__ . '/dependency-path-mapping.php'; |
| 710 |
$dependency_path_mapping = new Page_Optimize_Dependency_Path_Mapping(); |
| 711 |
} |
| 712 |
$path = $dependency_path_mapping->uri_path_to_fs_path( $uri ); |
| 713 |
} |
| 714 |
|
| 715 |
if ( false === $path ) { |
| 716 |
page_optimize_status_exit( 404 ); |
| 717 |
} |
| 718 |
|
| 719 |
return $path; |
| 720 |
} |
| 721 |
|
| 722 |
if ( ! defined( 'PAGE_OPTIMIZE_SKIP_SERVICE_REQUEST' ) ) { |
| 723 |
page_optimize_service_request(); |
| 724 |
} |
| 725 |
|
